I have check-ups every year with the cardiologist and have been told that the mechanical
valve can act as an irritant to the
heart and can cause PVCs etc. These, for me, are all normal. I really live a normal life and am not restricted in any way.
I'm not sure what type of valve you received but try not to let worry rule your life. Are you under a cardiologists care? If not, find a good cardiologist and let him put your mind at ease.